the router is the brain and the optical device or whatever is the arm.
In the first days of MPLS deployed over ATM it was the same with a C7200 or routing engine used as brain for an ATM switch.
The target is to avoid too many levels if an MPLS label means a specific lambda = going to a specific remote PE on the edge of the optical cloud in case of fault the routing protocol will tell to the node you now need to send traffic to remote PEy using lambda2.
otherwise in case of fault each layer would try to react to faults in some cases doing opposite things
This document is an early notification of a behaviour change that will be introduced in IOS XR release 6.5.
IOS XR configuration principles relevant for this article are:
On router platforms all interfaces must be by defaul...
With XR 4.2.0 the ASR9000 is releasing a new line of hardware models. This amongst others is the RSP440, the next generation RSP with faster switch fabric along with Typhoon based Linecards, the next generation network processor.
The Cisco EPN system incorporates a network architecture designed to consolidate multiples services on a single Multiprotocol Label Switching (MPLS) transport network. This network is designed primarily based on Application ...